Mine detail: South Platte Pegmatite District

Previously called ''

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Location

Lat / long: 39.39555, -105.21502

Resource(B)

Primary: Feldspar, Quartz
Secondary: Fluorine-Fluorite, REE, Gemstone
Tertiary: Thorium, Niobium (Columbium), Tantalum, Manganese
Ore: Fluorite, Gadolinite, Quartz, Xenotime
Gangue: Amazonstone, Bastnaesite, Biotite, Calcite, Doverite, Fergusonite, Hematite, Limonite, Muscovite, Prochlorite, Pyrite, Pyrolusite, Sericite, Synchisite, Thalenite, Topaz, Yttrotantalite, Zircon
Orebody form: LENTICULAR

Production

Operation type: Unknown
Production size: Small
Development status: Producer
First production started: 1935
Last production ended: 1965

Geology

Host rock:Idaho Springs Formation;Pikes Peak Granite
Host type:Pegmatite
Associated rock:Pegmatite;Pikes Peak Granite
Associated type:Pegmatite,Granite
Structure:Front Range Uplift, Pikes Peak Batholith, Kennedy Gulch Fault Zone
Tectonic:Central Cordillera (Southern Rocky Mtns)
Alteration processes:Fe Oxidation In Biotite, Chloritization, Sericitization, Deuterogenic Wallrock Alt., 2d Hydrothermal Repl.

References

MRDSD010180
DEP10107990
Reference{Deposit:: SIMMONS, W.B., AND HEINRICH, E.W., 1980, RARE-EARTH PEGMATITES OF THE SOUTH PLATTE DISTRICT, COLORADO: CGS RESOURCE SER. 11, 131 P.}{Deposit:: PETERSON, W.L., 1964, GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO: USGS BULL. 1181-C, 23 P., 1 PL.}{Deposit:: HAYNES, C.V., JR., 1965, GENESIS OF THE WHITE CLOUD AND RELATED PEGMATITES, SOUTH PLATTE AREA, JEFFERSON COUNTY, COLORADO: GSA BULL., V. 76, NO. 4, P. 441-462.}{Deposit:: ADAMS, J.W., AND SHARP, W.N., 1972, THALENITE AND ALLANITE DERIVED FROM YTTROFLUORITE IN THE WHITE CLOUD PEGMATITE, SOUTH PLATTE AREA, COLORADO: USGS PROF. PAPER 800-C, P. C63-C69.}{Deposit:: HEINRICH, E.W., 1958, RARE-EARTH PEGMATITES OF THE SOUTH PLATTE-LAKE GEORGE AREA, DOUGLAS, TELLER, AND PARK COUNTIES, COLORADO (ABS.): GSA BULL., V. 69, NO. 12, PT. 2, P. 1579-1580.}{Deposit:: HAYNES, C.V., JR., 1958, RARE-EARTH MINERALIZATION IN THE WHITE CLOUD MINE NEAR SOUTH PLATTE, JEFFERSON COUNTY, COLORADO (ABS.): GSA BULL., V. 69, NO. 12, PT. 2, P. 1729-1730.}{Deposit:: ADAMS, J.W., AND OTHERS, 1962, THALENITE FROM TELLER COUNTY, COLORADO: USGS PROF. PAPER 450-D, P. D6-D8.}{Production:: SIMMONS AND HEINRICH, 1980}
ReporterSchwochow, Stephen D.